Playing .sqt on real speccy with D80

May sound strange but I want to play old music from SQ-Tracker (same applies for SoundTracker) on a real speccy. You know a real analog device generating saw sounds different to any emulator. Here is how I achieve this.

What is SQT

SQ-Tracker may compile the music in two ways. First is a compiled song with player routine (cca 1200 bytes long) or as a data only. The SQT to be find on net are usually only a data to be played with something like Ay_Emul. According to manual to SQ-Compiler the playing routine should be initialized at LOAD CODE address and should be relocatable. Play should start at Init+48. Silent is Init+32.

"Conversion"

First I thought attaching the player with SQ-Linker to .sqt file would be enought, but I was not successful (but it should work!). What helped me out was a utility tracker2ay from WOS, that is in Ruby. This needs a small modification, as new ruby changed some spec: